Alert archive / Virginia / Wind Chill Warnings in 2014

Wind Chill Warning 1, NWS Baltimore/Washington

January 5, 201417 counties in Virginia; Allegany County, Frederick County, Washington County, Maryland; 8 counties in West Virginia

NWS Baltimore/Washington issued this wind chill warning at Jan 5, 2014, 9:13 PM EST for 17 counties in Virginia; Allegany County, Frederick County, Washington County, Maryland; 8 counties in West Virginia. It took effect at Jan 6, 2014, 2:00 PM EST. It was in force for 38 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 5, 2014, 9:13 PM EST (02:13 UTC)
In effect from: Jan 6, 2014, 2:00 PM EST
Expired: Jan 8, 2014, 4:03 AM EST
In force: 38 hr
Issued by: NWS Baltimore/Washington

All 28 counties

Allegany County, MD, Frederick County, MD, Washington County, MD, City of Charlottesville, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV

The radar

The Sterling radar (KLWX), 89 km from the middle of the area, began a volume at 02:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.2 hours before the alert went out and 96 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 441 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 747 m²/s²
0-3 km storm-relative helicity: 917 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this wind chill warning went out at Jan 5, 7:22 PM EST, 1 hour 51 minutes earlier.

Area forecast discussion, Jan 5, 7:22 PM EST, 1 hour 51 minutes before

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Hazardous weather outlook, Jan 5, 7:12 PM EST, 2 hours 1 minute before

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The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 5, 9:02 PM EST	Dense Fog Advisory	LWX	Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church	9 hr
Jan 6, 1:17 AM EST	Wind Advisory	LWX	Greene, Highland, Madison, Nelson, Page, Rappahannock and 7 more	7 hr
Jan 6, 4:22 AM EST	Wind Chill Advisory	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 21 more	44 hr
Jan 6, 7:45 AM EST	Special Marine Warning	LWX		90 min
Jan 6, 10:04 AM EST	Winter Weather Advisory	LWX	Highland	8 hr
Jan 6, 12:44 PM EST	Small Craft Advisory	LWX		35 hr

Nearby

Wind Chill Warnings in Virginia, 2014 Wind Chill Warnings in West Virginia, 2014 Wind Chill Warnings in Maryland, 2014 Every wind chill warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.